Aristotle

Educating the mind without educating the heart is no education at all.

Even subjects that are known are known only to a few

Change in all things is sweet.

Those who excel in virtue have the best right of all to rebel, but then they are of all men the least inclined to do so.

Bad men are full of repentance.

It is unbecoming for young men to utter maxims.

Hence poetry is something more philosophic and of graver import than history, since its statements are rather of the nature of universals, whereas those of history are singulars.

The virtue of justice consists in moderation, as regulated by wisdom.

Excellence, then, is a state concerned with choice, lying in a mean, relative to us, this being determined by reason and in the way in which the man of practical wisdom would determine it.

The roots of education are bitter, but the fruit is sweet.

Education is an ornament in prosperity and a refuge in adversity.

Mothers are fonder than fathers of their children because they are more certain they are their own.

Quality is not an act, it is a habit.

He who hath many friends hath none.

Perfect friendship is the friendship of men who are good, and alike in excellence; for these wish well alike to each other qua good, and they are good in themselves.

Friendship is essentially a partnership.

Democracy is when the indigent, and not the men of property, are the rulers.

Homer has taught all other poets the art of telling lies skillfully.